Hi, I would like to ask that how can I connect a 1 terminal output oscillator with 2 terminal input of charge pump?
Circuit as shown in attachment.
Thanks.

 

Try this connection
And maybe you consider the change in digram.
For example of you use 74HC14 (HCT14) then you don need opamp circuit.

 

Thanks lot. By the way, I'm confused. Is charge pump connected to AC or DC supply?

 

Diode should be connect to DC voltage.
But gate must be connect to some kind of square wave generator.

 

Oh... I see.. The output of charge pump is DC right? This is what I get from my Multisim stimulation. It is correct?

 

Yes, you get DC voltage